If you look into it, you’ll discover that this song, far from being a centuries old church hymn or folk song, was written in 1962 at the height of the Cuban Missile crisis. The authors describe it as a plea for peace. With this information, one can easily interpret the star in a different manner, and it becomes clear why a star would have a tail. The song is worth an extra listen with consideration after this revelation regarding the situation.
https://libertarianinstitute.org/articles/do-you-hear-what-i-hear-a-christmas-prayer-for-peace/

If you were to listen to the popular Bing Crosby version of the Christmas classic, “Do You Hear what I Hear?”, you’d be forgiven for thinking the song is a simple diddy about the nativity of Christ, a very appropriate topic considering that this is what the holiday is about. You might also, however, notice a few anomalies with regard to the lyrics that could clue you in to the less obvious intent of Noël Regney and Gloria Shayne, the authors. For instance, why does a star have a “tail as big as a kite”? What is this “voice as big as the sea”? That doesn’t sound like the silent night that is normally ascribed to the birth of Jesus; quite the opposite.
Be seeing you

